On Tue, Feb 08, 2022 at 03:34:05PM +0100, Sebastian Andrzej Siewior wrote: > __raise_softirq_irqoff() adds a bit to the pending sofirq mask and this > is it. The softirq won't be handled in a deterministic way but randomly > when an interrupt fires and handles the softirq in its irq_exit() routine or > if something randomly checks and handles pending softirqs in the call > chain before the CPU goes idle. > > Add a local_bh_disable/enable() around the IRQ-off section which will > handle pending softirqs. And I still haven't seen any good explanation of why this is useful.
